frangatang,
cant push back until someone moves it and the its not my job guv is still alive and kicking!
Recollect in the 70s as BA FO, manager asked me to move a luggage tractor intentionally left behind our aircraft. I declined but politely suggested that he remove the offending machine.
The vehicle remained and the flight was cancelled. I was astonished that our manager did not just jump in and move it. In his position I would have done so.